Photographic-printing apparatus



Jan. 21, 1930. A. L. MAYER PEOTOGRAPHIC PRINTING APPARA'I US Filed Oct. 12. 1926 2 Sheets-Sheet attozmqj Jan. 23, 1930. A. L. MAYER PHOTOGRAPHIC PRINTING APPARATUS Filed Oct. 12, 1926 2 Sheets-Shea.

i 45 light casing,

Patented Jan. 21, 1 930 PATENT curios ALVIN L. MAYER, OF LGNG ISLAND CITY, HEW YQRK PHOTOGRAPHIC-PEINTING APPAltAT'fifi Application filed @ctoher 12, N26. Serial Ho. 141,223.

This invention relates to apparatus for printing photographs in which negatives and sensitized paper are together passed across a narrow light emitting area which supplies the necessary amount of light to the negative and paper as they are passed by said opening. My invention particularly relates to apparatus of the kind in which negatives and paper are supplied in pairs to the appam ratus in contra-distinction to apparatus in which a continuous series of negatives and a sensitized strip or ribbon of paper is thus supplied.

A photographic printing apparatus ems bodying my invention comprises a suitable frame which supports a casing within which is arranged a source of light and which is formed with a slot through which the light passes to the negatives and to the paper to be printed. The light casing is surrounded by a cvlinder comprising a frame and a series of glass panels separated from each other by horizontally arranged strips or cross pieces. In the upper part of the frame is mounted a pressure roller having a soft covering which bears on the it into close contact with the negative and also presses the negative and pa er firmly against the glazed cylinder. e glazed cylinder is divided into sections bv the horizontally arranged strips and the glazed cylinder is slowly and intermittently turned by gearing connecting it with a motor.

My improvements are illustrated in the 86 accompanying drawings, in which Figure 1 is a side elevation -of a photographic printing apparatus embodying my im rovements.

' igure 2 is a front elevation thereof.

1 Figure 3 is a longitudinal section of part of the apparatus on the line 3-3 of Figure 4.

Figure 4 is a transverse section of part of the apparatus on the line 44 of Figure3.

Figure 5 shows a transverse section of a indicating how it may be equipped with an adjustable shutter.

Figure 6 is a detail view in perspective, illustrating how the adjustable shutter may beoperated. I The frame of the machine may be of any of the apparatus.

paper and presses frame by rollers a:

"form suitable to support the working parts As shown, the and l l A, A of the frame are connected 2 lower ends by cross pieces at (r at top the end plates are connected by a removable cross piece a The end plate A is formed with a circul ar opening a and the plate A is formed with a circular opening a The light casing B is cylindrical form and extends through the opening e is secured to the plate A by screws 5 which extend through lugs 5 cut from the casing and bent to assume positions at right angles to the axis of the casing. may be used for securing the casing to the frame, but that shown is suitable and sufficient. The casing B is formed at the top With a slot S through which li ht is transmitted and the casing is provided with parallel flanges s which extend upwardly from the casing on opposite sides of the slot and carry itrl'ips s of soft material, such as rubber or In order to vary the Width of the light slot I may employ an in Figures 5 and 6. This shutter consists of a metallic strip connected with thecasing B b pins extending through slots 6'. One of tlie pins may be provided with a handle t, as shown.

A source of light such as a light tube L is supported in the casing by a bracket F secured to the frame piece A". This bracket extends through a slot pin the casing.

Surrounding the casing B is a glazed cylinder G of somewhat larger diameter than the casing B. This cylinder consists of a skeleton frame com rising frame rings g, g and cross pieces w ich connect the rings 9, The cross pieces 9 are arranged regular istances apart so as to divide the cylinder into sections of equal area and between the sections are inserted segments H of glass or other suitable transparent material. The glass may be held in to the cated.

The cylinder G is supported in the main which are carried by the and cont-act with the in place by strips 7 of. thin metal applied cylinder in the manner clearly lndiend plates A, A

adjnstable shutter T, shown 7 Any other suitable way material such as rubber or forward by the At one end the ring 9' of the cylinder is secured at g to spokes G, extending radially from the inner end of the hub G? which extends through the ring g'. This hub may be perforated as shown to reduce its weight, although this is not essential. The outerrend of the hug Gr is supported in hearings in a hanger M attached to the lower end of an arm of the bracket 0 which latter is secured to the upper part of the frame A. To the outer end of the hub G is secured a ratchet wheel R which is engaged by a pawl V carried by the upper end of a lever W pivoted intermediate its terior of the rings g, gf.

ends at w to the ratchet wheel R. The lower end of the lever W is pivotally connected with one end of a link Q, the opposite end of which is pivotally ,conected to a-lever K, pivoted atk to 'an arm K extending from the main frame and supporting a motor Dythe shaft d of which is coupled at d with a horizontally arranged screw E, having bearings in a housing E supported on the bracket 0.

The screw E meshes with a worm wheel I mounted in a casing J and the outer end of the shaft of the worm Z provided with a diagonal slot 2 into which wheel carries a disk extends a crank pin Z carried. by one'end of alink Z pivotally connected at its opposlte' end of the vertical lever K. The pin Z may be adjusted in the slots to regulate the movement of the link Z The motor is run at comparatively high speed, but by the worm gearing shown the speed of rotation of the disk Z is reduced and a further reduction of the speed is iven to the cylinder G by means of the end to the upper lin s and levers interposed between the disk and the ratchet wheel R.

The disk Z is rotated continuously in one direction but the lever W is oscillated about its pivot win such manner termittent rotary movement to the glazed cylinder. 7

In the construction showna'quarter' turn is given to the cylinder G by each forward movement of the pawl V so as to bring the a time successively over glass panels H one at the slot S. a

A pressure roller U covered with some soft felt u is mounte the frame of the cylthe manner shown in Figure 4. The roller U is not positively turned but is operated by frictional contact with the cylinder G. v

The 'operator takes from adjacent piles negatives and sensitized paper and feeds them to. the glazed cylinder below' the pressure in hearings in the upper ends of roller. A single negative and a singlepiece of sensitized paper is placed on a glass panel the operation when the cyl- Then the cylinder is moved motor mechanism beforc H at each step pf inder is at rest.

of rotation as to give an in-' d adapted to cylinder during the respective fight-emitting slot takes another negative and another piece of paper and places them on the next glass panel H while the cylinder is at rest and then the cylinder moves forward again and the negative and paper assover the slot S and are delivered at the ack of the machine-in the manner before described. These operations are repeated until the supply of negatives and paper is exhausted or until a ,suflicient supply of printed pictures is obtained.

This apparatus as shown has been placed into service and operates efiiciently in the manner above described.

I claim as my invention: 7 1. In a photographic printing apparatus, the combination with 'a stationary opaque casing having a single light-emitting slot, a lamp within the casing light rays outwardly through said single slot, a rotary transparent cylinder surrounding the casing for directing superposed sensitized and non-sensitized papers past the said slot of the cylinder, said cylinder comprising a frame including end rings, bars connecting the rings and spaced equi-distance apart, transparent panels disposed between and supported by adjacent bars and respectively adapted to support in succes-' sion said superposed sensitized and nonsensitized papers, an actuating means for intermittently rotating the cylinder whereby the bars of the cylindir during the respective periods of rest will e positioned in registration with the light-emitting slot of the casin 2. in a photographic printing apparatus, the combination with a -stationary opaque casing having a single light-emitting slot, a lamp within the casingfor transmitting light rays outwardly through said single s rotary transparent cylinder surrounding the casing for directing superposed sensitized and non-sensitized papers past the said slot of the cylinder, saidcylinder comprising a frame including end rings, bars connecting the rings and spaced equi-distance apart, transparent panels disposed between and supported by adjacent bars and respectively support in succession said superposed sensitized and non-sensitized papers, a shutter for adjusting the" area of said slot, and actuating means for intermittently rotating .the' cylinder whereby the bars of the periods of rest will be positioned in registration with the of the casing.

In testimony whereof, I have hereunto subscribedvmy name;

- a ALVIN L MAYER.

scribed and the negative and paper pass by I lot, a 

